In“Wittgenstein and Qualia,”Ned Block presents an inversion argument for qualia.Taking Wittgenstein's notes as the starting point,Block argues that if we admit the possibility of the“innocuous”inverted spectrum,we will have to accept the“dangerous”inverted spectrum,where qualia are ineffable contents of experience contents that cannot be fully captured by public language.In my opinion,Block's argument merits suspicion as it begs the question.While claiming to oppose the inner arena model like Wittgenstein,he presupposes its validity in his argument.I will finally examine how Wittgenstein dissolves confusion about qualia by the way of grammatical analysis.